2002 Toyota Yaris failed MOT. Fast Idle test reached 2220rpm with a minimum of 2500. The garage want to replace lambda sensor and the CAT but is there anything such as air filter and sparks I could try first?
I was thinking in my limited knowledge. Would changing the spark plugs and air filter make any difference rather than the $$$$$ it will cost to replace the CAT and Lambda sensor?
Saturday, March 24th, 2012 AT 2:20 PM